Driver circuit with automatic offset compensation of an...

Details Driver circuit with automatic offset compensation of an... Driver circuit with automatic offset compensation of an...

2008-03-18

2008-03-18

Lam, Tuan T (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C372S029014, C372S029015, C372S038070, C250S205000

Reexamination Certificate

active

11285106

ABSTRACT:
A driver circuit is provided, which includes a differential amplifier whose output signal controls the driving input signal, a reference signal generator that supplies a reference input of the differential amplifier, an external feedback that applies a signal, which is dependent on the output signal, to a feedback input of the differential amplifier, an adapter circuit, and an internal feedback activated in a compensation mode as an alternative to the external feedback, which internal feedback provides a signal to both the feedback input and the adapter circuit even for input signals that do not exceed the first threshold. The adaptor circuit generates and stores a compensation signal that compensates an offset signal acting alone at the reference input when the reference signal generator is switched off, and feeds the stored compensation signal, together with a reference signal, to the reference input or feedback input when the external feedback is activated.

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patent: 40 24 002 (1992-01-01), None
patent: WO 2004/040721 (2004-05-01), None

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